Tray for an invalid walker



FIG. 1 is a top perspective view of a tray for an invalid walker showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a side elevational view thereof, the opposite side elevational view being a mirror image of that shown. 

The ornamental design for a tray for an invalid walker, as shown and described. 